An eraser, a straight line, and a fast forward button would make this game 5/5. Other than that, it's a pretty fun physics game. Simple, interesting, and enjoyable.
One of my people spent $500 riding the elevator up and down for a month. Another person walked in, played a round of bowling, washed his clothes, and walked out. He didn't even stay for a night.
Whatiswrongwiththesepeople.
Hey man, whatever floats your boat. ;)